Scott - Thank you for the comments. I appreciate that.
I see nothing wrong with giving a fellow board member a "heads up" about a certain card. No need to get into a bidding war with a friend.
In the past, I have contacted other board members quite frequently, but
not always. I can't let Johnny get all those freak T206s!

Either way, most of the board members I've contacted are strong bidders and so am I if we want the card for our collection. So I can't imagine the sellers being to unhappy about about the final price.
Does communication between perspective buyers affect a card's final price? I'm sure it does. Sometimes for the good and sometimes for the bad. In the end, there are alot of other factors involved.
Jantz